英文關鍵字
acidic
dirt
energy
environment
health
heat
industry
liquors
manufavcturing
operated
outdoor
pipe
pump
pumping
reciprocating
related
safe
safety
scald
scale
steam
tar
vapour
water
英文關鍵字
acidic
dirt
energy
environment
health
heat
industry
liquors
manufavcturing
operated
outdoor
pipe
pump
pumping
reciprocating
related
safe
safety
scald
scale
steam
tar
vapour
water